CN112483201A - Oil supply system using oil injector as power source - Google Patents

Oil supply system using oil injector as power source Download PDF

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Publication number
CN112483201A
CN112483201A CN202011257117.XA CN202011257117A CN112483201A CN 112483201 A CN112483201 A CN 112483201A CN 202011257117 A CN202011257117 A CN 202011257117A CN 112483201 A CN112483201 A CN 112483201A
Authority
CN
China
Prior art keywords
oil
ejector
pump
power source
supply system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011257117.XA
Other languages
Chinese (zh)
Inventor
吴建军
张立明
晁红伟
朱英杰
张明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou Guoneng Steam Turbine Engineering Co Ltd
Original Assignee
Hangzhou Guoneng Steam Turbine Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hangzhou Guoneng Steam Turbine Engineering Co Ltd filed Critical Hangzhou Guoneng Steam Turbine Engineering Co Ltd
Priority to CN202011257117.XA priority Critical patent/CN112483201A/en
Publication of CN112483201A publication Critical patent/CN112483201A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/18—Lubricating arrangements
    • F01D25/20—Lubricating arrangements using lubrication pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/08—Cooling; Heating; Heat-insulation
    • F01D25/12—Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
    • F04F5/10—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N39/00—Arrangements for conditioning of lubricants in the lubricating system
    • F16N39/06—Arrangements for conditioning of lubricants in the lubricating system by filtration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N2210/00—Applications
    • F16N2210/02—Turbines

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

The invention discloses an oil supply system taking an oil ejector as a power source, which comprises an oil tank, a backup oil pump and a main oil pump, wherein the backup oil pump and the main oil pump are connected in parallel, one end of the backup oil pump and one end of the main oil pump are respectively communicated with the oil tank, the other end of the backup oil pump and the other end of the main oil pump form a merging point, the oil supply system taking the oil ejector as the power source also comprises the oil ejector, the oil ejector is arranged in the oil tank, the inlet of the oil ejector is communicated with the merging point, the outlet of the oil ejector is communicated with a lubricating system, the merging point is communicated with an oil regulating system, oil is divided into two paths from the merging point, one path of the two paths of oil enters the oil. Because the ejector is introduced, when the oil pump is selected, the rated flow can be determined according to the sum of the regulated oil quantity and the ejection flow, the flow during the model selection of the oil pump is effectively reduced, the model selection power of the motor is also reduced, and the energy consumption of the unit during the operation is reduced.

Description

Oil supply system using oil injector as power source
Technical Field
The invention relates to an oil supply system, in particular to an oil supply system taking an oil injector as a power source.
Background
As an important device of the steam turbine, the main function of the oil supply system is to provide lubricating oil and conditioning oil for the steam turbine. A conventional oil supply system is generally configured as shown in fig. 1, and includes a main oil pump 20 and a backup oil pump 30. After being pumped out by an oil pump, the oil in the oil tank 10 enters an oil cooler 40 and an oil filter 50 after the oil pressure is adjusted, and then is divided into two paths, wherein one path of oil enters a bearing of the steam turbine unit to assist the lubrication and cooling of the bearing and take away friction heat; the other path enters a regulating oil system of the steam turbine.
In a typical oil supply system, the pressure of the conditioned oil is generally higher than the lube oil pressure. Therefore, the flow rate of the oil pump is determined by the sum of the amount of lubricating oil and the amount of adjusting oil, and the head selection is determined by the higher pressure. The lubricating oil and the conditioned oil share a duplex oil filter 50 and a duplex oil cooler 40. When the oil passage at the outlet of the oil filter 50 is divided into two, the regulating oil system and the lubricating oil system are respectively connected. A throttle valve 60 is added in the lubricating oil pipeline to convert high-pressure oil into low-pressure oil, and the low-pressure oil enters a lubricating oil system. In a typical steam turbine plant, where the differential pressure is between 0.7MPa and 1.5MPa, there is a large throttling energy loss. The energy loss here means a reduction in the kinetic energy of the fluid. After the fluid is pressurized in the system, the pressure is reduced, and unnecessary energy waste exists in the process.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an oil supply system which can reduce energy consumption and takes an oil injector as a power source.
One of the purposes of the invention is realized by adopting the following technical scheme:
the utility model provides an use oil feeding system of jetter as power supply, includes oil tank, reserve oil pump and main oil pump, reserve oil pump with the main oil pump is parallelly connected, reserve oil pump and main oil pump one end respectively with the oil tank intercommunication, reserve oil pump and the main oil pump other end forms the merging point, use the oil jetter as the oil feeding system of power supply still include the jetter, the jetter install in the oil tank, the jetter entry and merging point intercommunication, the jetter export and lubricating system intercommunication, merging point and regulating oil system intercommunication, oil divide into two the tunnel from the merging point, get into the regulating oil system all the way, another way process the jetter with the oil that the jetter was absorb after the oil in the oil tank mixes the step-down flows into lubricating system.
Furthermore, the oil supply system with the oil ejector as a power source also comprises an adjusting oil filter, one end of the adjusting oil filter is communicated with the merging point, the other end of the adjusting oil filter is communicated with the adjusting oil system, and oil flowing out of the merging point flows into the adjusting oil system after being filtered by the adjusting oil filter.
Furthermore, the oil supply system using the oil ejector as the power source also comprises a lubricating oil filter, wherein the lubricating oil filter is communicated with the oil ejector, and the oil flowing out of the oil ejector flows into the lubricating system after being filtered by the lubricating oil filter.
Furthermore, the oil supply system with the oil ejector as the power source also comprises an oil cooler, the oil cooler is communicated with the oil ejector, and oil flowing out of the oil ejector flows into the lubricating system after being cooled by the oil cooler.
Furthermore, the oil cooler is positioned between the oil ejector and the lubricating oil filter, and the oil flowing out of the oil ejector is cooled by the oil cooler and then flows into the lubricating system after being filtered by the lubricating oil filter.
Further, the power and the flow rate of the main oil pump and the backup oil pump are the same.
Compared with the prior art, the oil supply system with the oil ejector as the power source has the advantages that the set of ejector is introduced, when the oil pump is selected, the rated flow can be determined according to the sum of the regulated oil quantity and the injected flow, the flow of the main oil pump and the standby oil pump during model selection is effectively reduced, the model selection power of the motor is also reduced, and the energy consumption of a unit during operation is reduced under the condition that the pressure still keeps the pressure required by the regulated oil. When the oil ejector works, jet flow enters the oil ejector, partial vacuum is formed in the suction chamber, oil in the oil tank is sucked and enters the throat pipe of the oil ejector together with the injection flow, the working jet flow and the suction flow are subjected to energy sufficient exchange in the throat pipe and continuously enter the diffusion pipe, and the dynamic pressure of the mixed flow is converted into the static pressure of oil flow. The pressure of the mixed outlet of the ejector minus the pressure loss of the oil cooler and the oil filter should be equal to the pressure of the lubricating oil, so that the loss caused by the original throttling of the oil flow is effectively utilized, and the loss caused by throttling is used as a power source.
Drawings
FIG. 1 is a schematic view of an oil supply system according to the prior art;
fig. 2 is a schematic structural diagram of an oil supply system using an oil injector as a power source according to the present invention.
In the figure: 10. an oil tank; 20. a main oil pump; 30. a backup oil pump; 40. an oil cooler; 50. an oil filter; 51. a lubricating oil filter; 52. a conditioning oil filter; 60. a throttle valve; 70. an oil injector.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present, secured by intervening elements. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Fig. 2 shows an oil supply system using an oil injector as a power source according to the present invention, which includes an oil tank 10, a main oil pump 20, a backup oil pump 30, an oil cooler 40, a lubricating oil filter 51, a conditioned oil filter 52, and an oil injector 70.
The oil tank 10 serves for storing a medium (turbine oil). The main oil pump 20 cooperates with a driving motor to be a power source for normal use of the oil supply system. The backup oil pump 30 is used together with a driving motor as a backup power source of the oil supply system after the failure of the main oil pump 20. The main oil pump 20 and the backup oil pump 30 are the same in type. When the oil pump is selected, the rated flow can be determined according to the sum of the regulated oil quantity and the injection flow, and the pressure still keeps the pressure required by the regulated oil. The structural dimensions of the interior of the oil injector 70 need to be determined by specific calculations based on the pressure ratio and the flow ratio.
When an oil supply system using an injector as a power source is assembled, the main oil pump 20 and the backup oil pump 30 are connected in parallel. One end of the main oil pump 20 communicates with the oil tank 10, and the other end forms a merging point with the output end of the backup oil pump 30. The backup oil pump 30 has one end communicating with the oil tank 10 and the other end forming a merging point with the output end of the main oil pump 20. The conditioned oil filter 52 is in communication with the merge point and is in communication with the conditioned oil system. The oil ejector 70 is installed in the oil tank 10, and the bottom of the oil ejector 70 is communicated with the oil tank 10. The input of the oil injector 70 is connected to the merging point, and the output of the oil injector 70 is connected to the oil cooler input 40. The output end of the oil cooler 40 is communicated with the input end of the lubricating oil filter 51, and the output end of the lubricating oil filter 51 is connected with a lubricating system.
When the system is used, the main oil pump 20 and the backup oil pump 30 are used as power sources, the outlets of the pump merging points are divided into two paths of oil, one path of oil directly enters the regulating oil filter 52, and flows into a regulating oil system after being filtered by the regulating oil filter 52; the other path of the oil enters the oil ejector 70 as injection oil, after the working jet flow of the oil ejector 70 enters the oil ejector 70, partial vacuum is formed in the suction chamber, the oil in the oil tank 10 is sucked into the oil ejector 70 and enters a throat of the oil ejector 70 together with the injection flow, the working jet flow in the throat and the suction flow are fully exchanged in energy and continuously enter a diffusion tube, the dynamic pressure of the mixed flow is converted into the static pressure of the oil flow, the oil flow flows out of the outlet of the oil ejector 70, sequentially enters the oil cooler 40 and the lubricating oil filter 51 and then flows into a lubricating oil system. The pressure at the mixed outlet of the oil jet 70 minus the pressure loss between the oil cooler 40 and the oil strainer 51 is equal to the pressure of the lubricating oil.
Compared with the prior art, the oil filter 50 is divided into two groups of independent filters, the oil injector 70 is additionally arranged to replace the original throttle valve 60 (see fig. 1), the loss generated by the original oil flow throttling is effectively utilized, the loss generated by throttling is used as a power source, the operation is simple and convenient, and the energy consumption of a unit can be effectively reduced under the condition that the system cost is not increased.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, variations and modifications can be made without departing from the spirit of the invention, and all equivalent modifications and changes can be made to the above embodiments according to the essential technology of the invention, which falls into the protection scope of the invention.

Claims (6)

1. The utility model provides an use oil injection ware as oil feeding system of power supply, includes oil tank, reserve oil pump and main oil pump, the reserve oil pump with the main oil pump is parallelly connected, the reserve oil pump with main oil pump one end respectively with the oil tank intercommunication, the reserve oil pump with the main oil pump other end forms merging point, its characterized in that: the oil supply system with the oil ejector as the power source further comprises an oil ejector, the oil ejector is installed in the oil tank, an inlet of the oil ejector is communicated with a merging point, an outlet of the oil ejector is communicated with the lubricating system, the merging point is communicated with the oil regulating system, oil is divided into two paths from the merging point, one path of oil enters the oil regulating system, and the other path of oil enters the lubricating system after being mixed and depressurized in the oil tank and sucked by the oil ejector and the oil ejector.
2. The oil supply system using the oil injector as a power source as claimed in claim 1, wherein: the oil supply system with the oil ejector as a power source further comprises an adjusting oil filter, one end of the adjusting oil filter is communicated with the merging point, the other end of the adjusting oil filter is communicated with the adjusting oil system, and oil flowing out of the merging point flows into the adjusting oil system after being filtered by the adjusting oil filter.
3. The oil supply system using the oil injector as a power source as claimed in claim 1, wherein: the oil supply system with the oil ejector as the power source also comprises a lubricating oil filter, wherein the lubricating oil filter is communicated with the oil ejector, and oil flowing out of the oil ejector flows into the lubricating system after being filtered by the lubricating oil filter.
4. The oil supply system using the oil injector as a power source as claimed in claim 3, wherein: the oil supply system with the oil ejector as a power source further comprises an oil cooler, the oil cooler is communicated with the oil ejector, and oil flowing out of the oil ejector flows into the lubricating system after being cooled by the oil cooler.
5. The oil supply system using the oil injector as a power source as claimed in claim 4, wherein: the oil cooler is positioned between the oil ejector and the lubricating oil filter, and the oil flowing out of the oil ejector is cooled by the oil cooler, filtered by the lubricating oil filter and then flows into the lubricating system.
6. The oil supply system using the oil injector as a power source as claimed in claim 1, wherein: the power and the flow of the main oil pump and the backup oil pump are the same.
CN202011257117.XA 2020-11-11 2020-11-11 Oil supply system using oil injector as power source Pending CN112483201A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011257117.XA CN112483201A (en) 2020-11-11 2020-11-11 Oil supply system using oil injector as power source

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011257117.XA CN112483201A (en) 2020-11-11 2020-11-11 Oil supply system using oil injector as power source

Publications (1)

Publication Number Publication Date
CN112483201A true CN112483201A (en) 2021-03-12

Family

ID=74929870

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011257117.XA Pending CN112483201A (en) 2020-11-11 2020-11-11 Oil supply system using oil injector as power source

Country Status (1)

Country Link
CN (1) CN112483201A (en)

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